You will have to determine what you will need for your style of fishing. If you fish in smaller ponds you can get a small jon boat or pontoon boat like mine. I would suggest a 8 or 10' boat for this kind of fishing.
A larger jon boat or bass boat is needed for fishing in larger lakes and rivers. You can look on craigslist or in your local classifieds for great deals, that's how I found my boat.
Always carry safety equipment like life jackets and fire extinguishers.